A well written piece and a common theme to remember.
We do need to take the advice above, but remember that the main issues are the ways mind is relating to various objects.
The barter system is now seen as a more pure form of trade (than money) and engagement. But due to scarcity and greed it evolved from the basics, the essence, of giving. The US money system, once backed by gold, is another further step away from pure giving. Yet it is here and it will not go away as long as greed and scarcity prevail (both mindsets). We can't just do away with them, just as we can't do away with hatred and greed. Even in our own minds we have not this capacity, so how do we wish it upon others?
We need to dig in, and get to work on the very factors that have created these issues. Namely our own greed, ignorance, etc. and stop blaming systems that are generated by the very qualities we posses. Understanding that if greed itself were eradicated then whatever was left would function more purely be it political systems or money.
So enough talking a reading and playing these intellectual games. Sit still, focus on your breath, observe the chaos of your own body and mind until equanimity develops. Once this is solid then with a balanced mind change the world as a firm example.